ZnO Nanoparticles: Synthesis, Characterization, and Ecotoxicological Studies
- 2 March 2010
- journal article
- research article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 26 (9), 6522-6528
- https://doi.org/10.1021/la100293s
Abstract
The potential ecotoxicity of nanosized zinc oxide (ZnO), synthesized by the polyol process, was investigated using common Anabaena flos-aquae cyanobacteria and Euglena gracilis euglenoid microalgae. The photosynthetic activities of these microorganisms, after addition of ZnO nanoparticles, varied with the presence of protective agents such as tri-n-octylphosphine oxide (TOPO) and polyoxyethylene stearyl ether (Brij-76) used to control particle size and shape during the synthesis. In the case of Anabaena flos-aquae, the photosynthetic activity, after addition of ZnO, ZnO-TOPO, and ZnO-Brij-76, decreased progressively due to stress induced by the presence of the nanoparticles in the culture medium. After contact with ZnO-TOPO nanoparticles, this decrease was followed by cell death. On the other hand, after 10 days, a progressive increase of the photosynthetic activity was observed after contact with ZnO and ZnO-Brij-76 nanoparticles. In the case of Euglena gracilis, cell death was observed after contact with all nanoparticles. Transmission electron microscopy (TEM) analyses of ultrathin sections of microorganisms showed that polysaccharides produced by Anabaena flos-aquae avoid particle internalization after contact with ZnO and ZnO-Brij-76 nanoparticles. On the other hand, nanoparticle internalization was observed after contact with all nanoparticles in the presence of Euglena gracilis and also with ZnO-TOPO nanoparticles after contact with Anabaena flos-aquae.Keywords
This publication has 15 references indexed in Scilit:
- Effect of complexing agents on properties of electroless Ni–P depositsMaterials Science and Technology, 2008
- Toxicological Effect of ZnO Nanoparticles Based on BacteriaLangmuir, 2008
- Comparative eco-toxicity of nanoscale TiO2, SiO2, and ZnO water suspensionsWater Research, 2006
- Investigation into the antibacterial behaviour of suspensions of ZnO nanoparticles (ZnO nanofluids)Journal of Nanoparticle Research, 2006
- How the doors to the nanoworld were openedNature Nanotechnology, 2006
- Toxicological Impact Studies Based on Escherichia coli Bacteria in Ultrafine ZnO Nanoparticles Colloidal MediumNano Letters, 2006
- Environmental Risks of Nanotechnology: National Nanotechnology Initiative Funding, 2000−2004Environmental Science & Technology, 2006
- Zinc Oxide Protects Cultured Enterocytes from the Damage Induced by Escherichia coliJournal of Nutrition, 2003
- Polyol‐Mediated Synthesis of Nanoscale Functional MaterialsAdvanced Functional Materials, 2003
- Submicrometer zinc oxide particles: Elaboration in polyol medium and morphological characteristicsJournal of Materials Research, 1995